Question 16.5: What is the overturning moment due to the lateral wind force...

What is the overturning moment due to the lateral wind forces assuming that the vessel is supported at the lower shell-to-head junction for the vessel mentioned in Example 16.4.

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From Figure 16.10, the moment arm for force F_{1} is

h_{1} = 7.5 ft

The moment arm for force F_{2} is obtained by integrating the equation

h_{2}=(5.167 / 21,560) \int_{15}^{102.03} 24.0\left(z^{0.174}\right)(z) d z

= 60.6 ft.

The total bending moment is

M=h_{1} F_{1}+h_{2} F_{2}

= (7.5)(2980)+(60.5)(21,560)

= 1,328,900 ft-lbs.

16 10

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